Internal-combustion engine.



J. W. PITTS.

INTERNAL COMBUSTION ENGINE.

APPLIGATION FILED ma. 1, 1911 LQQQGQ? Patented Mar. 17, 1914;.

. WITNESSES; INVENTOR Jame 4K P/rrJ I ATTORNEYS J. W. 211m.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED MAR, l, 1911.

3 SHEETS--SHEET 2.

Patented Mar. 17, 1914.

J. W. PITTS.

INTERNAL COMBUSTION ENGINE.

APPLIOATION FILED MAR.1,1911.

Patented Mar. 1?, 1914.

3 SHBETE-SHEET 3.

INVENTUI? /0///v 4z/. P07

WITNESSES.

Arrokn frs iiiirriiii TURN W, PITTS; O11 BISBEE, .iRIZONA, .QSEEIGIIOE '33-'13 PITTS IL-SYAL BZSBEE, ARIZQNA, A GOEPQRATIQIN 0F ARILQENA in xi g ij rr g' gi cocoon.

application filer'i March 1, 1911. Serial 'i'c. $114351.

To all whom it may; concern Be it known that I, J 01m -W. PITTE, 2i citizen of the United Stat-cs, and a resident of Bisbee, in the county of Cochise and. State of Arizona, have made certain new and usefui Improvements in Internal-Combustion Engines, of which the following is a specification.

My invention relates to internal combos tion engines, anc'lit consist in the combinw tions and crrangeme its hercin described and claimcoii An object of my invention is toprovide novel means for ridding thecyiindersof the spent gases or products of combustion and for cooling the cylinders.

A further cbjectof my invention is to provide means for doing away with the back ressurcon the exhaust. This I accomplish y means of a dcvicewhich makes use of flie momentmn acquired by like gases them selves.

A further obg'ect of my invention is to provide a, device whereby a piuroiity of pistons may be connected to Work absolutely in unison. v

A i'i rlzhcr object; of my invention to provicie a novcl form of compression chamber for the explosive charges. v ()ther ob3ect and advaniages wilicppear in the follow-mg specificat on and the novel feczmes ofthe device will be particularly pointed out in the appemicd cieims.

My invention "is illustrated in the eccoimjoliczitioia. in Whicl1- Figure 1 is a Side View of iihQfliiEl lCG, cer-, i-ain portions being broken away 50 show the (letciis, Fig 2is a longitudinal vertical section through the device, Fig.- 3 is a section along the line 3-3 of Fig. 2, iooking in the direction of the arrows.

Referring not? particularly -to Figs:- 1 and 2, I have shown therein, a. main frame 1", having verticaily extemlirig integral web 2 (see .di 2). At the upper and of the frame 1 is secured a coi er ii, which is designed to protect tho eccentric and to form with the interior parts of the frame 1 and with the removable plates 4 (sec Fig. 1) protective casing for the mechanism conieineci therein. r

.zidc one end of the arising or frame 1 is bolted the cylinder A. A similar cylinder B i secured to the opposite end of casing.

deecribctLj, The member B ltwo cylinders, b and an auxiliary cyiindcr but which will open :1.

the pipe may be piccoside of t'ncenginc if I I have used the term cyiindcr the member A is really made up of cylinders, cue cyii'ndcr a beia cylinder m2 the other cyiii auxiliary cyiindcr, for a m b these cylinders being identical in all rcspccts with their companion cy imiers a. and 1 An examination of will show i that at the rear end of the i. her A ic passage-way a by which ti .3 a communicates with the cyliiir a". 1'" ji? ton P is {fliSQQSGCi in cyiimier c, Wilili? av piston 39 13 disposed in the cylinder 0;,

The opposite cylinders Z) and wided with pistons P and; 72, correspomiing;

ssiclred; in througl'i the pipe mummies with o iffili'illlli'fii' hm: It will bermderstoogi film; the opp or). 'oliama' bar C which coxm'nnnicctos, by means oi pipe 5', with a valve clmnbcr hzwinr valve Similar to that shown al '7 in F the ,vaive chamber 6' in turn ccmmmsi'. vi, ing, by means of a pipe 9", wiiiia inc commm carburetor (not shown}. in 3, I lmvo shown opening}; 5, which, i covcrcd oy 1; plate 5 his plate may he removed am! M i on the op 're'iciic Referring again i ,11 it wiil bc econ that on one side of ti! caliber-i3 Qh oi conimunicabmg with it is ELXQlfl/G casing; 10, pro

Nideri with an air valve ill, which is hornmiiy held against its "mite i lay HERBS of a spring 12. On the opposite side oi'i lr'icitfii'fl oer D is an exhaust pipev 1Z5 w ich i bent. laterally, and which line core 11 it an integral pipe l3- lcadin from the chamber D of the cylinders A. ttention is called to the fact that these two exhaust pipes 13 and 13 deliver exhaust gases to a common exhaust pipe 14, as shown in Fig. 1 This forms oneof the important features. of my invention, which will be fully explained later.

The cylinders A and B are provided with usual'water jackets J and J and with spark plugs 15 and 15, respectively. The piston rod pkof the piston P passes through a stufiing box 16 and is connected 'with the outer-member e of the eccentric in the manner shown in Fig. 2. From this figure it will be seen that the piston rod is threaded ,so as to be screwed into or out of the memher 6 and is provided witha jamb nut,

which may be tlghtenedagainst the member e to hold the rod in lace. From Fig. 2, it

. will be seen that each of the pistons P, 72, P

and 7) is'also adjustably connected with the member 6, the piston rods of the auxiliary pistons p and p being connected through the extensions 6 and e on the member 6. This construction provides for the adjustment of the pistons in their cylinders. Each piston rod is provided with a suitable stuffmg box. 7

.The mechanism for-converting a reciprocatory movement of the piston rods into rotary movement is shown in Fig. 2. It comprises a circular strap 6 having extensions 6 and e which are secured together. The piston rods pi and p and the auxiliary piston rods 12* and p are adj ustably connected to the strap as already explained. The strap e is designed to embrace the eccentric F (see Fig. 2). This eccentric is really a combination of a gear and eccentric. It has an arc-shaped portion 1 (see Fig. 2) having a channel to receive the strap 6. The arc-shaped member ];1 is integral with the gears f and f wine member. It willbe understood that this rotating member has been termed eccentrio for want of a better name, and simply because the major portion of the part revolves about an axis which is not centrally located of the part. I. do not mean to intimate that the oflice or function of the eccentric F is like that of the ordinary eccentrio, because it is not, as will be fully explained later.

Referring .now to Fig. 2, it will be seen that the part f is provided with a central opening 1" through which extends the central member 9 of crank mechanism, which includes the parts g at one end, g at the other end, the shaft H and the shaft H. In Fig. 2 the central ortion 9 and the pore tions of the shafts and H are shown in dotted lines. Each ofithese members is provided with a i-.-d 1 ce .-'portion securcd to the central member .9, en enlarged narily; it would suck go to make up part of the rotating Now on gas is compressed in the compression chamber C and the pipe ,5. As soon, however, as the piston P uncovers the openings 6, the compressed gas in the chamber C- and pipe 5 rushes'into the cylinder Z2 behind the piston. On the next stroke of the piston, the gas is-compresscd in the rear end of the cylinder, and at the proper. time the sparking circuit is closed and the explosion drives forward the piston P. The piston P, it will be remembered, is connected with the strap 6, as is the auxiliary piston p in the auxiliary cylinder 6 The pistons P and p, therefore, travel in. unison. An inspection of Fig. 2'will show that the openings 6" are uncovered by the piston '50 before. the openings b -are uncovered bythe piston P, partly for the reason that the openings 6 are of reater length, and partly for the reason t at the piston p is slightly ahead of the piston P. When the pistonp, therefore, uncovers the openings 6 the gases oi combustion rush out through the passage 6 through the auxiliary cylinder 6 through the openings b", into the to the exhaust 14.

Letus consider now whathappens when pipe 13 and thence the piston p makes its return stroke. Ordiin air or spent gas through the openings 6''.

momentum acquired by the gas? through the exhaust pipe is sufiicient to cause the cold air intake valve 11 to open whenthe iston p-begins its rearward stroke, so that t egases which acquire their momentum by the forward stroke of the piston 72 pass on out through the pipe 14 whileat the same time col fresh air is drawn through the valve 11 and into the cylinder 6 thereby'cooling'the auxiliary cylinder. Onthe next forward stroke of the piston p the cold air is' driven outthrough the ex haust ipe 13, the valve 11 resenting itself. There is", therefore, an, alternate succession of rapid puifsof spent gases and cold air rushing traveling in the same direction through the exhaust pipe. This tends to greatly reduce the backpressure on the engine, because of the momentum acquired by the gases 1n the By providing the valve 11 (see Fig. 3), I have foundthat the exhaust pipe. The other pistons, which correspond to 'thoseg ajustdescribed, operate in the same manner. ,The position of the pis tons, as stated, may be regulated by screwing up, or unscrewing the piston rods, and

' tions by means of then clamping them in theinudjusted posi their jamb nuts. I claim:

1. In an internal combustion engine, a casing, a main cylinder, an auxiliary cylind'er, each 'of said cylinders being provided with a series of openings near one end thereof, a common passage connecting said i cylinders at the opposite end thereof, a piston for each cylinder, an exhaust pipe communicating with the auxiliary cylinder through the openingspf the latter, an air port for admitting air, through the openings in the auxiliary" cylinder, and a valve for said air port arranged to open' on the movement of the piston of the auxiliary cylinder toward said common passage.

2. In an internal combustion engine, a casing,.a main cylinder, aniauxiliary'cy linder, each of said cylinders being provided with a series of open ngs near one end thereof, a common passage connecting said cylinders at th'e 'opposite endthereof, a piston for each cylinder arranged to uncover its respective openings,-""an exhaust pipe having free communication-iwith the openings in said auxiliarycylinder, an air chamber also having free'communication with the openings in said auxiliary cylinder, a check valve disposed in said air chamber and arranged 3. In casing, a main cylinder and an auxiliary to open toadmit air .on the movement of t e piston of the auxiliary cylinder toward said common passagean internal combustion engine, a

cylin Within said casing, a communicating passage at the rear end of sardcylmders,

each of said oylinders'being provided with a series of lateral openings atits forward end,

- a piston and a piston rod for each cylinder,

each of said piston rods being connected to a common reciprocating member, the mam pistonbeing adapted to uncover the openings in said main cylinder, and the auxiliary {piston being adapted to uncover the openings of said auxiliary cylinder, a compression chamber disposed adjacent said main cylinder and adapted tocommunicate with a it through the lateral openings in said. main cylinder, an exhaust pipe disposed adjacent said auxiliary cylinder and adapted to com- ,municate with it through the openings in said auxiliary .cylinder, the movement of ,tudinal openings near one said auxiliary piston being in advance of said mainpiston in the forward stroke, thereby permitting the discharge of the gases of combustion before the entrance 'of the compressed charge through the inlet -rigid connection so as to vary the relation of.

the pistons to their respective openings.

5. In an internal combustlon engine, a

casing, a main cylinder, an auxiliary cylinder within said casing, each of said cylinders being provided with a series of openings near one end thereof, a common passage connecting said cylinders at the opposite end thereof, a piston rod for each piston, a common rigid connection for said main piston rod and said auxiliary piston rod,'and means for adjusting the position of the auxiliary piston with respect to the main piston.

6. In an internal combustion engine, a casing, a main cylinder, an auxiliary cylinder, each of said ,cylindersbeing provided with a series of openings near one end thereof, a common passage connecting said cylindeis at the opposite end thereof, a piston for each cylinder arranged to uncover its respective openings, an exhaust pipe on one side of the auxiliary cylinder having free communication with the 'openings in the auxiliary cylinder, an air chamberon the opposite side of said auxiliary-cylinder also having free communication with the open ings in said auxiliary cylinder, and an air inlet valve for admitting air into the air chamber on the movement of the piston of the auxiliary cylinder toward the common passage,said' air valve being arranged to close on the reverse movement of the auxiliary piston thereby causing the air to be forced out through the exhaust pipe.

' JOHN W. PITTS.

Witnesses:

- L; A. STANLEY, SOLO'N C. IKELIONZI 

